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https://issues.apache.org/jira/browse/HBASE-11405?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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bharath v updated HBASE-11405:
------------------------------
Attachment: HBASE-11405-trunk.patch
This patch creates a file in <rootdir>/<tmpdir> and maintains a lease on it
till hbck exits. Parallel instances of hbck check if such a file exists and
bail out if necessary. Added a shutdownhook() to this class to clean up the
lock file incase user kills hbck with a SIGTERM. I make sure that the cleanup
is done only once using a flag.
> Multiple invocations of hbck in parallel disables balancer permanently
> -----------------------------------------------------------------------
>
> Key: HBASE-11405
> URL: https://issues.apache.org/jira/browse/HBASE-11405
> Project: HBase
> Issue Type: Bug
> Components: Balancer, hbck
> Affects Versions: 0.99.0
> Reporter: bharath v
> Attachments: HBASE-11405-trunk.patch
>
>
> This is because of the following piece of code in hbck
> {code:borderStyle=solid}
> boolean oldBalancer = admin.setBalancerRunning(false, true);
> try {
> onlineConsistencyRepair();
> }
> finally {
> admin.setBalancerRunning(oldBalancer, false);
> }
> {code}
> Newer invocations set oldBalancer to false as it was disabled by previous
> invocations and this disables balancer permanently unless its manually turned
> on by the user. Easy to reproduce, just run hbck 100 times in a loop in 2
> different sessions and you can see that balancer is set to false in the
> HMaster logs.
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